Hi Valentin,
There is a bug with the native Ibex engine where filenames with an upper-case extension in chunk_includes will make the experiment crash on that “loading” message, which would be consistent with your experience. I realize that you have read the troubleshooting page however, so it’s probably not that
Another thing to note (although I’m unsure it would cause a crash there) is that serving resource files (images, audios, videos) from the chunk_includes folder (Resources) is specific to the PCIbex Farm: if your project contains resource files in its chunk_includes folder, you should move them to the www folder instead
Feel free to share the link to your standalone experiment, here or by email at support@pcibex.net
Jeremy